With the Adobe Photoshop CC 2015.1 release came the advent of the Diffusion slider. If. I had to boil down the definition of what this slider setting does to its most direct meaning, it means: how much Photoshop looks at the surrounding area when removing a blemish.

What does diffusion do in Photoshop?

Diffusion slider control

The Healing Brush, Spot Healing Brush, and Patch tool in Photoshop have a Diffusion slider which controls how quickly the pasted region adapts to the surrounding image.

How do you diffuse in Photoshop?

In the layers panel, right click on the image and duplicate the layer. Make sure the new layer is on top of the old one. Then go to Filter – Filter Gallery and click the dropdown arrow next to distort. Select the effect Diffuse Glow.